Ras - as I said, I don't have any tang sights with the push button lock in the rear - but I don't know that it is custom. It seems that I have heard of these - maybe someone can help me out on this?
Jed - I think Les is looking for the info. you mentioned. I wonder how many "known" specimens have come to light? P.M. me of any you find for sale! Emphasis on the P.M.
